Designed by John Mauchly and J. Presper Eckert, inventors of the ENIAC, the UNIVersal Automatic Computer I was the first commercial computer produced in the US. The US Census Bureau had the first UNIVAC delivered to them on March 31, 1951. The UNIVAC I's first contracts were with government institutions such as the Census Bureau, the US Air Force, and the US Army Map Service. The UNIVAC I used 5200 vacuum tubes, weighed 13 metric tons, consumed 125 kW, and could perform ~1905 operations per second. The whole system occupied more than 35.5m2 of area. Its main memory consisted of 1000 words which each contained 12 characters. 6 alphanumeric characters, packed 2 per word, were used as the instructions.
